SDL's Claude.md

The SDL project has published a Claude.md file stating that generative AI, including large language models, should not be used in any way when contributing to SDL, and that AI-generated comments or code should not be submitted in bug reports or pull requests. The project says it wants its code to be "art" and to interact with real humans, adding that "we want to connect with you, not your computer." Any pull request to the project will ask contributors to confirm they are the author and are contributing their changes under the zlib license.